One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(10,14)(11,12)(15,16)(17,18,22,26)(19,23,29,32)(20,24,21,25)(27,30,28,31)(2,5)(6,8)(10,15)(11,12)(14,16)(17,19)(18,23)(20,28)(21,27)(22,29)(24,31)(25,30)(26,32) involution — undirected(1,3)(2,6)(4,7)(5,8)(9,10,13,16)(11,15,12,14)(18,24)(19,27)(20,21)(25,26)(28,29)(30,31)(3,7)(6,8) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.